how far; to what extent; up to what point
Used to ask about physical distance, degree, or limit. Common in both literal and figurative contexts.
How far is it to the station?
どこまで本気で言っているの？
To what extent are you serious?
endlessly; anywhere; forever · to the bitter end; come what may; to the utmost · stubbornly; persistently · in every respect; on every point · thoroughly; exhaustively
Kanji spelling; rarely used in modern writing.
Kanji spelling with 迄; very rare.
Compound of どこ (where) + まで (until, up to).